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My "Service Engine Soon" light has come on a second time in a month.
My mechanic reset it after I thought I had cause the fault after taking off the large plastic tube between the air filter and the injection systen, when I checked my power steering fluid.

It came on a second time with a 0004 & 0005 codes.
My mechanic has not been able to check the definition of the codes.

Has anyone had this problem?
Does anyone know what the 0004 & 0005 codes mean?